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Mobile and front-end developer with 5+ years of experience delivering high-impact applications across financial, renewable energy, and healthcare domains. Specialized in Flutter and Vue.js, with strong expertise in Node.js/TypeScript, scalable architecture, internationalization, CI/CD, and automated testing. I build secure, modular products using clean architecture and state management (Cubit/MobX/GetX), and I collaborate in Agile environments to ship reliable releases at scale, improving performance, reducing regressions, and accelerating market expansion through i18n and optimized delivery pipelines.…Mobile and front-end developer with 5+ years of experience delivering high-impact applications across financial, renewable energy, and healthcare domains. Specialized in Flutter and Vue.js, with strong expertise in Node.js/TypeScript, scalable architecture, internationalization, CI/CD, and automated testing. I build secure, modular products using clean architecture and state management (Cubit/MobX/GetX), and I collaborate in Agile environments to ship reliable releases at scale, improving performance, reducing regressions, and accelerating market expansion through i18n and optimized delivery pipelines.

Erick Serejo

App Developer, Front-End Developer, Back-End Developer, +1

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Mobile and front-end developer with 5+ years of experience delivering high-impact applications across financial, renewable energy, and healthcare domains. Specialized in Flutter and Vue.js, with strong expertise in Node.js/TypeScript, scalable architecture, internationalization, CI/CD, and automated testing. I build secure, modular products using clean architecture and state management (Cubit/MobX/GetX), and I collaborate in Agile environments to ship reliable releases at scale, improving performance, reducing regressions, and accelerating market expansion through i18n and optimized delivery pipelines.…Mobile and front-end developer with 5+ years of experience delivering high-impact applications across financial, renewable energy, and healthcare domains. Specialized in Flutter and Vue.js, with strong expertise in Node.js/TypeScript, scalable architecture, internationalization, CI/CD, and automated testing. I build secure, modular products using clean architecture and state management (Cubit/MobX/GetX), and I collaborate in Agile environments to ship reliable releases at scale, improving performance, reducing regressions, and accelerating market expansion through i18n and optimized delivery pipelines.

Available to hire

Mobile and front-end developer with 5+ years of experience delivering high-impact applications across financial, renewable energy, and healthcare domains. Specialized in Flutter and Vue.js, with strong expertise in Node.js/TypeScript, scalable architecture, internationalization, CI/CD, and automated testing.

I build secure, modular products using clean architecture and state management (Cubit/MobX/GetX), and I collaborate in Agile environments to ship reliable releases at scale, improving performance, reducing regressions, and accelerating market expansion through i18n and optimized delivery pipelines.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Portuguese

Fluent

English

Advanced

Work Experience

Mobile Engineer at CI&T

April 1, 2025 - Present

Architected and developed a payment SDK from scratch for a major insurance company, implementing RSA encryption and tokenization to securely handle credit card data across multiple payment gateways. Designed the solution using Clean Architecture and Cubit state management. Optimized 12 API endpoints through strategic parallel/sequential call orchestration to complete the process in under 10 seconds, improving end-to-end payment performance and reliability.

Mobile Engineer at UOL Compass

March 1, 2023 - February 1, 2025

Developed payment flows in Flutter for a financial institution using Cubit and Clean Architecture to ensure modularity and scalability, reducing regressions by 32%. Contributed to the event creation flow in the Track&Field application, resolving critical bugs and decreasing crash reports by 40%, supporting on-time releases for 500k+ active users. Led internationalization of a white-label financial app by implementing language modularization, reducing localization effort for new markets by 60% and enabling expansion to 3+ countries.

Front-End and Mobile Engineer at Sou Energy

January 1, 2022 - March 1, 2023

Developed mobile features with Flutter using MobX and GetX, contributing to a 25% sales increase during the app launch period. Implemented web systems in Vue.js using Vuex and Pinia, and led migration from Vue 2 to Vue 3, resulting in a 40% improvement in production deployment performance. Introduced unit tests (Jest) and CI/CD pipelines to improve quality and release cadence.

Front-End Engineer at Lauduz

January 1, 2021 - December 1, 2021

Designed and developed a telemedicine system for real-time patient monitoring. Implemented dynamic charts using Vue and Flutter, and added real-time communication via WebSockets to support timely updates for users.

Junior Developer at Prolins

July 1, 2019 - January 1, 2021

Completed four Flutter projects, three React.js projects, and one Vue.js project. Published three apps on the Apple App Store and Google Play, contributing to production delivery and mobile product lifecycle.

Education

System Information Degree at Fametro

January 2, 2025 - January 2, 2025

Bachelor in Information Systems at Unifametro

January 1, 2017 - January 1, 2021

Qualifications

Junior Developer - Prolins

January 2, 2025 - January 2, 2025

- Delivery of national-level cargo transportation and tracking systems. - Delivered 2 Flutter applications: - One developed using Mobx with the MVVM architectural pattern. - Another developed using Getx for state management.

Mid Developer - Sou Energy

January 2, 2025 - January 2, 2025

- Developed mobile systems features using Flutter with Mobx and Getx for state management. - Developed web systems using Vue 2 and Vue 3, integrating Vuex and Pinia for state management. - Led the migration of systems from Vue 2 to Vue 3, transitioning from a PHP monolith to an independent front-end system - Utilized Vuetify and Bootstrap Vue as UI frameworks. - Introduced Jest unit tests for comprehensive system coverage. - Responsible for implementing unit tests and the company's CI/CD. - Facilitated the teaching and empowerment of other team developers through mentorship and training sessions.

Mobile Developer - UOL Compass.

March 2, 2023 - January 2, 2025

- Participation in the credit flow in a financial application using Cubit and Clean Architecture. - Participation in an event system using Clean Architecture and Mobx.